Hi there, @Dave_The_Rave_Uk. From what you've described, it sounds like your selfies are "flipped." To get your photos looking as expected, I recommend activating your front-facing/selfie camera > Settings > Save selfies as previewed (toggle this ON).
Following the aforementioned steps will ensure that the selfies you take will appear exactly as they do in the preview. 👍📷
I'd also recommend consulting the guide below (from our colleagues at Samsung Australia) - just in case you need to flip/edit any selfies you have already saved: